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B. Huber, R. Prenner, N. Krouzecky:
"Boosting the Discharge of a Hydropower Plant";
Materials Today: Proceedings (eingeladen), 32 (2020), ISSN: 2214-7853; S. 207 - 214.

At the power plant Opponitz in Austria 2.3 km of tunnels were rehabilitated with glass-fibre reinforcedplastic (GRP) pipes which were drawn into the original tunnel profile. Due to the reduction in cross-section this measure led to a considerable reduction in the maximum turbine quantity of water fromthe desired 12.7 m3/s to about 11 m3/s. Subsequently the owner of the power plant commissioned theInstitute of Hydraulic Engineering and Water Resources of the Vienna University of Technology to finda possible solution to this problem.Since a reduction of the flow resistance of the already relatively smooth GRP pipeline was not techni-cally possible, a proposal was developed for the creation of a suction operation in the relined pipe.Hydraulic model tests carried out at the hydraulic laboratory of the Vienna University of Technologyshowed that the proposed hydraulic engineering solution works and allows the desired increase of thedischarge up to 12.7 m3/s.Ó2019 Elsevier Ltd. All rights reserved.Selection and peer-review under responsibility of the scientific committee of the 36th Danubia AdriaSymposium on Advances in Experimental Mechanics.

At the power plant Opponitz in Austria 2.3 km of tunnels were rehabilitated with glass-fibre reinforcedplastic (GRP) pipes which were drawn into the original tunnel profile. Due to the reduction in cross-section this measure led to a considerable reduction in the maximum turbine quantity of water fromthe desired 12.7 m3/s to about 11 m3/s. Subsequently the owner of the power plant commissioned theInstitute of Hydraulic Engineering and Water Resources of the Vienna University of Technology to finda possible solution to this problem.Since a reduction of the flow resistance of the already relatively smooth GRP pipeline was not techni-cally possible, a proposal was developed for the creation of a suction operation in the relined pipe.Hydraulic model tests carried out at the hydraulic laboratory of the Vienna University of Technologyshowed that the proposed hydraulic engineering solution works and allows the desired increase of thedischarge up to 12.7 m3/s.Ó2019 Elsevier Ltd. All rights reserved.Selection and peer-review under responsibility of the scientific committee of the 36th Danubia AdriaSymposium on Advances in Experimental Mechanics.

Civil engineering; hydraulic engineering; hydro power plant; hydraulic model tests; tunnel renovation

http://dx.doi.org/10.1016/j.matpr.2020.04.639